Accumulator plate



May' 25 J.' MCD. BURNETT ET Ac.

ACCUMULATOR LATE Filed Ma 6, 1924 2 Shee s-Sheet 1 y 4) MMHUUHNMHHWHHJUh J. MCD. BURNETT ET AL AccUMULAToR PLATE Filed May e, 1924 2sheets-sheet 2 f May 25 1926.

M. @.QQQGQGQQQ GG O1000 OQ 5,@

-...@Q VG lgl 00 @.@QDQQ 0:@ .Gsm @QQ .GGIQ OQQQQQQQQ Wb@ @@@UDQ 9Patented May 25, i926.

l'UNITED sra'rns errar/raies.

JAMES MCDON'ALD BURNETT, OF WESTON-BYWELLAND, ANDLJOHN ALFRED FULLI-LOVE, F MARKET HAB/BOROUGH, ENGLAND.

ACCUM'ULATOR ELATE.

Appncaaon nies May e, 1924. serial no. 711,465.

This invention relates to accumulator plates.

@ne object of the invention is the provision of an accumulator platehaving an in- I sulating frame secured around :the edge thereof wherebya Ip'luraflitv of Isuch accumulator plates arranged side by side will bepositively .prevented from making electrical contact with one another,

Another object is the provision of means for positively vand Vrigidlysecuring. on an economic `and `.commerieal scale, an insulating framearound vthe .edge -of an accumulator plate.

Another object is the provision of an accumulator plate built up o-f aAnumber of cast lead lunits and haring `an insulating frame secured.around the ledge thereof said units and frame being held together in asingle `structure of greater rigidity than an ordinary lead accumulatorplate.

Other objects and ,advantages will appear hereinafter.

Two embodiments of the invention are il- 25 lustrated in theaccompanying .drawings and Figure l .is .a perspective view of .one of ithe wooden frame members of one ofthe embodiments.

Figure '2 shows in perspective in 4elevation and in section views of thefra-me ymembers arranged in a position illustrating one stage in theprocess lof manufacture of the plate.

Figure 3 shows in side elevation and in section the nished plateenclosed in its frame.

Figure 4 is a plan view of two disassem- .bled vadjacent frame membersof the other embodiment.

Figure 5 -is .a sectional end elevation of kthe same.

Figure y6 is a sectional side elevation of all :Eour frame members shownin their .assembled relation with respect -.to one another, and

Figure 7 isa Side .elevation of ra finished plate enclosed in a frameformed of frame :members such as lthose illustrated in Figures 4 to 5,

Referring first to Figures l-B the plate comprises a number of units`(such as that described with reference to Figure l of :the drawings ofLetters Paten-t of the United States, No, 1,564,524 granted to me Dec.8, 1925) and four wooden frame member-s 2. The units, as described `inthe specification aforesaid are of square formation and have a number ofperforations 3 adapted to aecommodate accumulator paste and symmetricalgrooves 4 formed along theiredges; and the frame .members have .each .agroove in one longitudinal edge and inwardly tapering holes 6 leading tosaid groove from the opposite longitudinal edge.

As shown, the units are arranged edge `to edge `to form a square orrectangular mosaic and the frame members yare arranged around the ouideedge of such mosaic with their grooves inwards. The whole is boundtogether ,-in .this correlation by means of some acid proof .conductingmaterial, such as anti- Vmonial lead (which is .of greater rigiditv thanlead), cast i-n the .hidden communicating channels which run betweenyall wthe adjacent ypairs of .units and also between the frame .membersand the outside units.

In the construction of the arrangement the plate proper may be rstformed in the manner described in the specification accompanying Ithecopending rapplication aforesaid except that no metallic -frame or lugis formed, the frame members being afterwards secured therearound byclamp- 'rig them in position .and pouring antimonial lead through .the.tapering holes 6 so yas -to `fill the concealed channel between the.plate proper and the said frame members; or .the separate units andframe members may be bound together by one casting ,operation `of theantimonial lead. In this .latter case .the frame members are arranged.in .-a template in the relation shown in Figure 2 and .the units arearranged and clamped by suitable clamps in the position within the frame.members shown in Figure 8. Antimonial lead is then poured or forcedthrough the tapering holes 6 and .percolates through the network ofcommunicating intersecting channels running between .all the adjacentpairs of units and also between the .outside unit-s and the framemembers and Vthereby positively secures the whole structure t0- gether.Y

By Virtue of the tapering holes 6 being filled with antimonial lead,positive joints are constituted, as will be readily understood, betweenthe frame members and the accumulator plate proper.

Referring now to Figures l to 7 these figures illustrate theconstruction of an embodiment of the invention in which, in the firstplace, the antimonial lead is not exposed outside the frame membersexcept where desired for electrical connection, 1n the second place, thetapering holes 6 arev dispensed with, and in the third piace asupporting lug of the antimonial lead is cast into the structure duringthe operation of securing the several parts together.

As shown in Figures 1l to 5 each frame consists of four members two ofwhich, 2 are provided with grooves 5a extending the whole length thereofand the other two of which, 2b are provided with grooves 5l which do notextend the whole length thereof but terminate at points adjacent the twoends as shown.

rllhus by assembling the four frame members in the manner shown inFigure 6 a continuous channel is formed running round the inside edge ofthe frame which channel does not communicate with the outside edge ofthe frame.

A further feature of this embodiment resides in the fact that thegrooves 5a and 5b are undercut as shown in Figure 5, so that thesecurement of the frame members to the antimonial lead within thegrooves thereof and therefore to the plate proper is rendered positivewithout employment of the tapering holes 6. The straight sided holes 7at the two ends of the grooves 5b are formed, prior to such undercuttingof said grooves 5b, in order to render it possible to insert anundercutting tool into the groove.

rlhe plate proper and frame members such as above described (arranged inthe relation shown in Figure 6) are built and incorporated into onestructure precisely as in the case of the embodiment illustrated inFigures l. to 3 except that instead of antimonial lead being poured intothe network of communicating channels through the tapering holes 6, itis all poured through one large elongated hole or slot 8 formed in oneof the members 2a as indicated in Figure 7 This hole or slot moreoverpermits of the casting on of a supporting and terminal lug 9 ofantimonial lead integral with the antimonial lead which cements theunits and frame together.

Instead of being built up of units having symmetrical grooves aroundtheir edges, plates of varying thickness and having wooden frames as inthe embodiments above described may be built up of units the edges ofwhich are recessed to one side (as shown in Figure 3 of the drawings ofthe Letters Patent aforesaid) so that symmetrical grooves may be formedby placing a pair of units face to face. In this case pairs of units,placed in this manner face to face, are treated as single units to buildup the plate proper in the manner described in the specification of theLetter Patent aforesaid with reference to Figure 6 of the drawingsaccompanying the same. in this case frame members of proportionalthickness are of course used to enclose the plate.

Where a block battery is required this may be done by first drillingsimilarly disposed holes 8 (Figure 2) through similar frames of each ofa number of plates, next placing the plates one against the other inblock formation with these holes in registration and finally cementingthe plates into one block by filling these registering holes withantimonial lead. These holes may be made of smaller diameter in themiddle than at the ends in order to make the securement together of theplates more positive.

ln any of the aforedescribed embodiments, the holes 3 may obviously bemade bevelled as described with reference to Figure 2 of the drawingsaccompanying the specification of the Letters Patent aforesaid.

What we claim and desire to secure by Letters Patent is l. Anaccumulator plate structure comprising an accumulator plate proper, aninsulating frame secured around the edge thereof and a connectingelement cast between said insulating frame and said plate proper forsecuring the same together, said connecting element extending into arecess in said insulating frame which is of such shape that said frameis positively locked to said connecting element irrespective of theforce of adhesion.

2. An accumulator plate structure comprising an accumulator plateproper, an insulating' frame secured around the edge thereof and aconnecting element cast between said insulating frame and said plateproper for securing the same together, said connecting element extendinginto recesses in said insulating frame and said plate proper whichrecesses are of such shape that said insulating frame and said plateproper are both positively locked to said connecting elementirrespective of the force of adhesion.

3. An accumulator plate structure comprising an accumulator plate properand an insulating frame secured around the edge thereof, said insulatingframe and said plate proper being secured together by the process ofcasting therebetween an integral connecting element.

4. An accumulator plate structure comprising an accumulator plateproper, an insulating' frame secured around t-he edge thereof and aconducting connecting element cast between said insulating frame andsaid plate proper for securing the same together, said connectingelement extending at one point completely through the frame to theoutside edge thereof so as to thereby constitute a terminal of the plateproper.

5. An accumulator plate structure comprising a number of units togetherconstituting the accumulator plate proper, said units having formedtherein recesses which co-operate to form channels. running between saidunits, an insulating frame around the outside edge of the combinedunits, said insulating frame having formed therein an undercut groovearound the inside edge thereof which groove co-operates with recesses ofthe outside unitsl to form a channel running between said frame and theoutside edge of the combined units, and a conneeting framework of morerigid material than the material of the units cast both into said formerchannels and said latter channel and securing Said units and said frametogether into a rigid structure.

In witness whereof we a'fix our signatures.

JAMES MGDONALD BURNETT.

JOHN ALFRED FULLILOVE.

